upsetadj/ʌpˈsɛt/

• 1

  Angry, distressed, or unhappy

  • He was upset when she refused his friendship.
  • My children often get upset with their classmates.
• 2

  Feeling unwell, nauseated, or ready to vomit.

  • His stomach was upset, so he didn't want to move.
  • Bryan came home from school with an upset tummy.

upsetnoun/ˈʌp.sɛt/

• 1

  Disturbance or disruption.

  • My late arrival caused the professor considerable upset.
• 2

  governmenthobbieslifestyleAn unexpected victory of a competitor or candidate that was not favored to win.

  • But it is probably the biggest upset for the away side since Ronnie Radford smashed a famous goal as Hereford defeated Newcastle 2-1 in 1972.
  • Sanders’s win in Michigan was one of the greatest upsets in modern political history.
• 3

  automobileautomotivebusinessAn overturn.

  • "collision and upset": impact with another object or an overturn for whatever reason.
• 4

  An upset stomach.

  • “Bob, let's cancel the baby sitter. With this upset stomach, I can't go out tonight.” “Sure you can, Liz! Try Pepto-Bismol. Hospital tests prove it relieves upsets. And it's great for indigestion or nausea, too!”
• 5

  mathematicssciencesAn upper set; a subset (X,≤) of a partially ordered set with the property that, if x is in U and x≤y, then y is in U.

• 6

  aeronauticsaerospaceaviationThe dangerous situation where the flight attitude or airspeed of an aircraft is outside the designed bounds of operation, possibly resulting in loss of control.

  • The Board determines that the probable cause of this accident was the unfavorable interaction of severe vertical air drafts and large longitudinal control displacements resulting in a longitudinal upset from which a successful recovery was not made.
• 7

  A woven row supporting the foundation rods for the uprights of a basket.

  • Willow basket making, an artisan inserting bye-stakes in the upsets.

upsetverb/ʌpˈsɛt/

• 1

  To make (a person) angry, distressed, or unhappy.

  • I’m sure the bad news will upset him, but he needs to know.
• 2

  To disturb, disrupt or adversely alter (something).

  • Introducing a foreign species can upset the ecological balance.
  • The fatty meat upset his stomach.
• 3

  To tip or overturn (something).

  • 1924, W. D. Ross translator, Aristitle, Metaphysics, Book 1, Part 9, The Classical Library, Nashotah, Wisconsin, 2001. But this argument, which first Anaxagoras and later Eudoxus and certain others used, is very easily upset; for it is not difficult to collect many insuperable objections to such a view.
• 4

  To defeat unexpectedly.

  • Truman upset Dewey in the 1948 US presidential election.
• 5

  To be upset or knocked over.

  • The carriage upset when the horse bolted.
  • [T]he locomotive exploded and upset, and was completely wrecked.
• 6

  obsoleteTo set up; to put upright.

  • R. of Brunne with sail on mast upset
• 7

  artscraftsengineeringTo thicken and shorten a soft or heated piece of metal, by forging or hammering on the end, to shape, for example, rivets or internal combustion engine valves.

• 8

  To shorten (a tire) in the process of resetting, originally by cutting it and hammering on the ends.